If you somehow get stuck outside and think fallout is falling around you, cover your nose and mouth with a rag and close your eyes. Get to shelter immediately, where you should remove your outer layer of clothing, including that rag you just held over your face, and double seal it in plastic bags. Take a shower as soon as possible.The danger of fallout is relatively short-lived. The Department of Homeland Security says that radioactivity is reduced by 90 percent after seven hours. Two days later, only 1 percent of the original radiation remains. Still, maybe stay in that shelter for one more day. Just to be safe.
